[mythtv-users] Requesting some sample kill a watt meter numbers

[Greg Oliver]

On Tue, Jan 18, 2011 at 3:04 PM, Raymond Wagner <raymond at wagnerrp.com> wrote:
> On 1/18/2011 15:45, Greg Oliver wrote:
>>
>> While I share your same opinion on the Atoms, I have to jump in and
>> also say that all of the low power capable cpus that throttle down to
>> the same power usage all exhibit the same issue - and that is they
>> throttle more than the cpu, and starve other components.  This hampers
>> high bitrate playback, and renders them useless as well..
>
> That's not at all true.  The only time I have ever heard of clock stepping
> causing problems with VDPAU playback were on older AMD systems using
> integrated nVidia video.  The memory controller would downclock with the
> processor, and since the graphics chip had no memory of its own, it would be
> starved for bandwidth and stutter.  This is not the case when using modern
> processors, and was never the case when using discrete graphics.

Im not talking about clock stepping with vdpau..  I'm talking about
pci-e in general with the latency required to power step not meeting
the demand for video...  IE - if you are watching a movie with vbr,
and it all of the sudden triples its requirements (going from close up
almost still to far away landscape with high movement), the time
required is too much for the pc to compensate for; hence frame loss..
There is nothing to be done for it except disabling pcie power saving
in the bios.. My original point..

Same with clock stepping too now that you bring it up..